Let \Let\, v. t. [imp. & p. p. Let (Letted (l[e^]t"t[e^]d),
   [Obs].); p. pr. & vb. n. Letting.] [OE. leten, l[ae]ten
   (past tense lat, let, p. p. laten, leten, lete), AS.
   l[=ae]tan (past tense l[=e]t, p. p. l[=ae]ten); akin to
   OFries. l[=e]ta, OS. l[=a]tan, D. laten, G. lassen, OHG.
   l[=a]zzan, Icel. l[=a]ta, Sw. l[*a]ta, Dan. lade, Goth.
   l[=e]tan, and L. lassus weary. The original meaning seems to
   have been, to let loose, let go, let drop. Cf. Alas,
   Late, Lassitude, Let to hinder.]
   1. To leave; to relinquish; to abandon. [Obs. or Archaic,
      except when followed by alone or be.]
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            He . . . prayed him his voyage for to let.
                                                  --Chaucer.
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            Yet neither spins nor cards, ne cares nor frets,
            But to her mother Nature all her care she lets.
                                                  --Spenser.
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            Let me alone in choosing of my wife.  --Chaucer.
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   2. To consider; to think; to esteem. [Obs.] --Chaucer.
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   3. To cause; to make; -- used with the infinitive in the
      active form but in the passive sense; as, let make, i. e.,
      cause to be made; let bring, i. e., cause to be brought.
      [Obs.]
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            This irous, cursed wretch
            Let this knight's son anon before him fetch.
                                                  --Chaucer.
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            He . . . thus let do slay hem all three. --Chaucer.
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            Anon he let two coffers make.         --Gower.
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   4. To permit; to allow; to suffer; -- either affirmatively,
      by positive act, or negatively, by neglecting to restrain
      or prevent.
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   Note: In this sense, when followed by an infinitive, the
         latter is commonly without the sign to; as to let us
         walk, i. e., to permit or suffer us to walk. Sometimes
         there is entire omission of the verb; as, to let [to be
         or to go] loose.
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               Pharaoh said, I will let you go.   --Ex. viii.
                                                  28.
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               If your name be Horatio, as I am let to know it
               is.                                --Shak.
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   5. To allow to be used or occupied for a compensation; to
      lease; to rent; to hire out; -- often with out; as, to let
      a farm; to let a house; to let out horses.
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   6. To give, grant, or assign, as a work, privilege, or
      contract; -- often with out; as, to let the building of a
      bridge; to let out the lathing and the plastering.
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   Note: The active form of the infinitive of let, as of many
         other English verbs, is often used in a passive sense;
         as, a house to let (i. e., for letting, or to be let).
         This form of expression conforms to the use of the
         Anglo-Saxon gerund with to (dative infinitive) which
         was commonly so employed. See Gerund, 2. " Your
         elegant house in Harley Street is to let." --Thackeray.
         In the imperative mood, before the first person plural,
         let has a hortative force. " Rise up, let us go."
         --Mark xiv. 42. " Let us seek out some desolate shade."
         --Shak.
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   To let alone, to leave; to withdraw from; to refrain from
      interfering with.

   To let blood, to cause blood to flow; to bleed.

   To let down.
      (a) To lower.
      (b) To soften in tempering; as, to let down tools,
          cutlery, and the like.

   To let fly or To let drive, to discharge with violence,
      as a blow, an arrow, or stone. See under Drive, and
      Fly.

   To let in or To let into.
      (a) To permit or suffer to enter; to admit.
      (b) To insert, or imbed, as a piece of wood, in a recess
          formed in a surface for the purpose.

   To let loose, to remove restraint from; to permit to wander
      at large.

   To let off.
      (a) To discharge; to let fly, as an arrow; to fire the
          charge of, as a gun.
      (b) To release, as from an engagement or obligation.
          [Colloq.]

   To let out.
      (a) To allow to go forth; as, to let out a prisoner.
      (b) To extend or loosen, as the folds of a garment; to
          enlarge; to suffer to run out, as a cord.
      (c) To lease; to give out for performance by contract, as
          a job.
      (d) To divulge.

   To let slide, to let go; to cease to care for. [Colloq.] "
      Let the world slide." --Shak.
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Blood \Blood\ (bl[u^]d), n. [OE. blod, blood, AS. bl[=o]d; akin
   to D. bloed, OHG. bluot, G. blut, Goth. bl[=o][thorn], Icel.
   bl[=o][eth], Sw. & Dan. blod; prob. fr. the same root as E.
   blow to bloom. See Blow to bloom.]
   1. The fluid which circulates in the principal vascular
      system of animals, carrying nourishment to all parts of
      the body, and bringing away waste products to be excreted.
      See under Arterial.
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   Note: The blood consists of a liquid, the plasma, containing
         minute particles, the blood corpuscles. In the
         invertebrate animals it is usually nearly colorless,
         and contains only one kind of corpuscles; but in all
         vertebrates, except Amphioxus, it contains some
         colorless corpuscles, with many more which are red and
         give the blood its uniformly red color. See
         Corpuscle, Plasma.
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   2. Relationship by descent from a common ancestor;
      consanguinity; kinship.
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            To share the blood of Saxon royalty.  --Sir W.
                                                  Scott.
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            A friend of our own blood.            --Waller.
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   Half blood (Law), relationship through only one parent.

   Whole blood, relationship through both father and mother.
      In American Law, blood includes both half blood, and whole
      blood. --Bouvier. --Peters.
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   3. Descent; lineage; especially, honorable birth; the highest
      royal lineage.
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            Give us a prince of blood, a son of Priam. --Shak.
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            I am a gentleman of blood and breeding. --Shak.
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   4. (Stock Breeding) Descent from parents of recognized breed;
      excellence or purity of breed.
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   Note: In stock breeding half blood is descent showing one
         half only of pure breed. Blue blood, full blood, or
         warm blood, is the same as blood.
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   5. The fleshy nature of man.
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            Nor gives it satisfaction to our blood. --Shak.
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   6. The shedding of blood; the taking of life, murder;
      manslaughter; destruction.
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            So wills the fierce, avenging sprite,
            Till blood for blood atones.          --Hood.
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   7. A bloodthirsty or murderous disposition. [R.]
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            He was a thing of blood, whose every motion
            Was timed with dying cries.           --Shak.
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   8. Temper of mind; disposition; state of the passions; -- as
      if the blood were the seat of emotions.
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            When you perceive his blood inclined to mirth.
                                                  --Shak.
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   Note: Often, in this sense, accompanied with bad, cold, warm,
         or other qualifying word. Thus, to commit an act in
         cold blood, is to do it deliberately, and without
         sudden passion; to do it in bad blood, is to do it in
         anger. Warm blood denotes a temper inflamed or
         irritated. To warm or heat the blood is to excite the
         passions. Qualified by up, excited feeling or passion
         is signified; as, my blood was up.
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   9. A man of fire or spirit; a fiery spark; a gay, showy man;
      a rake.
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            Seest thou not . . . how giddily 'a turns about all
            the hot bloods between fourteen and five and thirty?
                                                  --Shak.
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            It was the morning costume of a dandy or blood.
                                                  --Thackeray.
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   10. The juice of anything, especially if red.
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             He washed . . . his clothes in the blood of grapes.
                                                  --Gen. xiix.
                                                  11.
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   Note: Blood is often used as an adjective, and as the first
         part of self-explaining compound words; as,
         blood-bespotted, blood-bought, blood-curdling,
         blood-dyed, blood-red, blood-spilling, blood-stained,
         blood-warm, blood-won.
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   Blood baptism (Eccl. Hist.), the martyrdom of those who had
      not been baptized. They were considered as baptized in
      blood, and this was regarded as a full substitute for
      literal baptism.

   Blood blister, a blister or bleb containing blood or bloody
      serum, usually caused by an injury.

   Blood brother, brother by blood or birth.

   Blood clam (Zool.), a bivalve mollusk of the genus Arca and
      allied genera, esp. Argina pexata of the American coast.
      So named from the color of its flesh.

   Blood corpuscle. See Corpuscle.

   Blood crystal (Physiol.), one of the crystals formed by the
      separation in a crystalline form of the h[ae]moglobin of
      the red blood corpuscles; h[ae]matocrystallin. All blood
      does not yield blood crystals.

   Blood heat, heat equal to the temperature of human blood,
      or about 981/2 [deg] Fahr.

   Blood horse, a horse whose blood or lineage is derived from
      the purest and most highly prized origin or stock.

   Blood money. See in the Vocabulary.

   Blood orange, an orange with dark red pulp.

   Blood poisoning (Med.), a morbid state of the blood caused
      by the introduction of poisonous or infective matters from
      without, or the absorption or retention of such as are
      produced in the body itself; tox[ae]mia.

   Blood pudding, a pudding made of blood and other materials.
      

   Blood relation, one connected by blood or descent.

   Blood spavin. See under Spavin.

   Blood vessel. See in the Vocabulary.

   Blue blood, the blood of noble or aristocratic families,
      which, according to a Spanish prover, has in it a tinge of
      blue; -- hence, a member of an old and aristocratic
      family.

   Flesh and blood.
       (a) A blood relation, esp. a child.
       (b) Human nature.

   In blood (Hunting), in a state of perfect health and vigor.
      --Shak.

   To let blood. See under Let.

   Prince of the blood, the son of a sovereign, or the issue
      of a royal family. The sons, brothers, and uncles of the
      sovereign are styled princes of the blood royal; and the
      daughters, sisters, and aunts are princesses of the blood
      royal.
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